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GeForce 8500 GT vs GeForce 8600 GS (OEM)

Intro

The GeForce 8500 GT comes with a GPU core clock speed of 450 MHz, and the 512 MB of DDR2 memory is set to run at 400 MHz through a 128-bit bus. It also is made up of 16 Stream Processors, 8 Texture Address Units, and 4 ROPs.

Compare all of that to the GeForce 8600 GS (OEM), which uses a 80 nm design. nVidia has clocked the core frequency at 540 MHz. The DDR2 RAM is set to run at a frequency of 400 MHz on this card. It features 32 SPUs along with 16 Texture Address Units and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8500 GT 45 Watts
GeForce 8600 GS (OEM) 47 Watts
Difference: 2 Watts (4%)

Memory Bandwidth

Both cards have the exact same memory bandwidth, so in theory they should perform the same. (explain)

Texel Rate

The GeForce 8600 GS (OEM) will be a lot (approximately 140%) better at texture filtering than the GeForce 8500 GT. (explain)

GeForce 8600 GS (OEM) 8640 Mtexels/sec
GeForce 8500 GT 3600 Mtexels/sec
Difference: 5040 (140%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce 8600 GS (OEM) is the winner, and very much so. (explain)

GeForce 8600 GS (OEM) 4320 Mpixels/sec
GeForce 8500 GT 1800 Mpixels/sec
Difference: 2520 (140%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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GeForce 8500 GT

Amazon.com

Check prices at:

GeForce 8600 GS (OEM)

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 8500 GT GeForce 8600 GS (OEM)
Manufacturer nVidia nVidia
Year April 2007 April 2007
Code Name G86 G84
Memory 512 MB 256 MB
Core Speed 450 MHz 540 MHz
Memory Speed 800 MHz 800 MHz
Power (Max TDP) 45 watts 47 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 3600 Mtexels/sec 8640 Mtexels/sec
Pixel Rate 1800 Mpixels/sec 4320 Mpixels/sec
Unified Shaders 16 32
Texture Mapping Units 8 16
Render Output Units 4 8
Bus Type DDR2 DDR2
Bus Width 128-bit 128-bit
Fab Process 80 nm 80 nm
Transistors 210 million 289 million
Bus PCIe x16, PCI, PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce 8500 GT

Amazon.com

Check prices at:

GeForce 8600 GS (OEM)

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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